In search of large signals at the cosmological collider
Abstract We look for oscillating signals in the primordial bispectrum from new physics heavy particles which are visibly large for next generation large scale structures (LSS) survey. We show that in ordinary inflation scenarios where a slow-rolling inflaton generates density fluctuations and with n...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-02-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP02(2020)044 |
| _version_ | 1818326779127922688 |
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| author | Lian-Tao Wang Zhong-Zhi Xianyu |
| author_facet | Lian-Tao Wang Zhong-Zhi Xianyu |
| author_sort | Lian-Tao Wang |
| collection | DOAJ |
| description | Abstract We look for oscillating signals in the primordial bispectrum from new physics heavy particles which are visibly large for next generation large scale structures (LSS) survey. We show that in ordinary inflation scenarios where a slow-rolling inflaton generates density fluctuations and with no breaking of scale invariance or spacetime symmetry, there exist no naturally large signals unless the rolling inflaton generates a parity-odd chemical potential for the heavy particles. We estimate the accessibility of this signal through observations. While current CMB data are already sensitive in the most optimistic scenario, future probes, including LSS survey and 21 cm observation, can cover interesting regions of the model space. |
| first_indexed | 2024-12-13T12:05:48Z |
| format | Article |
| id | doaj.art-3dd49e386fac4f0db2ddddf89f6bc375 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-13T12:05:48Z |
| publishDate | 2020-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-3dd49e386fac4f0db2ddddf89f6bc3752022-12-21T23:46:57ZengSpringerOpenJournal of High Energy Physics1029-84792020-02-012020212710.1007/JHEP02(2020)044In search of large signals at the cosmological colliderLian-Tao Wang0Zhong-Zhi Xianyu1Department of Physics, University of ChicagoDepartment of Physics, Harvard UniversityAbstract We look for oscillating signals in the primordial bispectrum from new physics heavy particles which are visibly large for next generation large scale structures (LSS) survey. We show that in ordinary inflation scenarios where a slow-rolling inflaton generates density fluctuations and with no breaking of scale invariance or spacetime symmetry, there exist no naturally large signals unless the rolling inflaton generates a parity-odd chemical potential for the heavy particles. We estimate the accessibility of this signal through observations. While current CMB data are already sensitive in the most optimistic scenario, future probes, including LSS survey and 21 cm observation, can cover interesting regions of the model space.https://doi.org/10.1007/JHEP02(2020)044Cosmology of Theories beyond the SMBeyond Standard ModelEffective Field Theories |
| spellingShingle | Lian-Tao Wang Zhong-Zhi Xianyu In search of large signals at the cosmological collider Journal of High Energy Physics Cosmology of Theories beyond the SM Beyond Standard Model Effective Field Theories |
| title | In search of large signals at the cosmological collider |
| title_full | In search of large signals at the cosmological collider |
| title_fullStr | In search of large signals at the cosmological collider |
| title_full_unstemmed | In search of large signals at the cosmological collider |
| title_short | In search of large signals at the cosmological collider |
| title_sort | in search of large signals at the cosmological collider |
| topic | Cosmology of Theories beyond the SM Beyond Standard Model Effective Field Theories |
| url | https://doi.org/10.1007/JHEP02(2020)044 |
| work_keys_str_mv | AT liantaowang insearchoflargesignalsatthecosmologicalcollider AT zhongzhixianyu insearchoflargesignalsatthecosmologicalcollider |